Anderson Silva surprises young fan

The video is in Portuguese so here's an explanation from Aladdin Alsahli on Facebook:

'For those who don't understand portuguese, Eduardo Picanço is Anderson Silva's dentist, and a friend asked if he could get an autograph from him because her son was a big fan. The boy used to be very athletic but he had a very rare bone desease that stuck him in a wheelchair, so the mother asked the autograph to give him strenght for the rehabilitation, but Anderson Silva rather to make a surprise for the boy. I apologize for my english, just wanted to let the world know how good this dude is.'